#pragma once
//file版
#include "../comm/util.hpp"
#include "../comm/log.hpp"
#include <iostream>
#include <string>
#include <vector>
#include <unordered_map>
#include <fstream>
#include <cassert>
#include <cstdlib>
// 根据题库，加载所有题目信息到内存中
// model： 主要用来数据进行交互，对外提供访问的接口

namespace ns_model
{
    using namespace std;
    using namespace ns_util;
    using namespace ns_log;
    struct Question
    {

        std::string number; // 题目编号
        std::string title;  // 标题
        std::string star;   // 难度
        int cpu_limit;      // 时间要求(s)
        int mem_limit;      // 空间要求(kb)
        std::string desc;   // 描述
        std::string header; // 预设代码
        std::string tail;   // 测试用例，和header拼接完成完整代码
    };
    const std::string questions_list = "./question/question.list";
    const std::string questions_path = "./question/";
    class Model
    {
    private:
        unordered_map<string, Question> questions;

    public:
        Model()
        {
            assert(LoadQuestionList(questions_list));
        }
        bool LoadQuestionList(const string &question_list)
        {
            // 加载配置文件：question/question.list + 题目编号文件
            ifstream in(questions_list);
            if (!in.is_open())
            {
                LOG(FATAL) << "加载题库失败，请检查是否存在题库文件"
                           << "\n";
                return false;
            }
            string line;
            while (getline(in, line))
            {
                vector<string> tokens;
                StringUtil::SplitString(line, &tokens, " ");
                if (tokens.size() != 5)
                {
                    LOG(WARNING) << "加载部分题目失败，请检测文件格式"
                                 << "\n";
                    continue;
                }
                Question q;
                q.number = tokens[0];
                q.title = tokens[1];
                q.star = tokens[2];
                q.cpu_limit = atoi(tokens[3].c_str());
                q.mem_limit = atoi(tokens[4].c_str());
                string path = questions_path;
                path += q.number;
                path += "/";
                FileUtil::ReadFile(path + "desc.txt", &(q.desc), true);
                FileUtil::ReadFile(path + "header.cpp", &(q.header), true);
                FileUtil::ReadFile(path + "tail.cpp", &(q.tail), true);
                questions.insert(make_pair(q.number, q));
            }
            LOG(INFO) << "加载题库。。。成功"
                      << "\n";
            in.close();
            return true;
        }
        bool GetAllQuestions(vector<Question> *out)
        {
            if (questions.size() == 0)
            {
                LOG(ERROR) << "用户获取题库失败"
                           << "\n";
                return false;
            }
            for (const auto &q : questions)
            {
                out->push_back(q.second);
            }
            return true;
        }
        bool GetOneQuestion(const string &number, Question *q)
        {
            const auto &iter = questions.find(number);
            if (iter == questions.end())
            {
                LOG(ERROR) << "用户获取题库失败,题目编号：" << number << "\n";
                return false;
            }
            (*q) = iter->second;
            return true;
        }
        ~Model() {}
    };
} // namespace ns_model
